Improvement in manufacture of sheet-metal ware



iin i'TED STATES Enter;

PATENT THEO. GOMME AND OHS. E. A. BEAUGRAND, OF PARIS, FRANCE.I

IMPROVEMENT IN MANUFACTURE voF SHEET-METAL' WARE.

Specification forming part of Letters Patent No. y15,5 l 3, dated August 12, 1856.

To all whom it may concern:

Beit known that we, TriEoDoRE GOMME and CHARLEs AUGUs'rE BEAUGEAND, of Paris, in the Empire of France, have invented certain Improvements in Machinery for Manufacturing Copper and other Metal XV are, (except castings 1:) and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed sheet of drawings, making a part of the same.

It is well known that up to this time culinary vessels and others manufactured by coppersmiths or tinkers for domestic purposes were made by the hand and the hammerthat is to say, the workman rolled, stamped, modeled by the hammer certain parts of the metal in order to give them various forms and shapes. This mode of working metals is very long and requires a great waste of force from mechanics. Besides, not only iinished pieces but even common ones come to a comparatively elevated price.` XVe have understood that it would be proper to reduce the net cost of those indispensable things, and have contrived, combined, and applied such economical means as will allow the sale of good line perfectly-worked products at very moderate prices.

rlhis invention relates to the stamping of the metal by a puncheon, whilethe surrounding l parts or edges are held with more or less tightness bctween two rings with grooved or smooth surfaces, said stamping operation either completing the work by itself or being preparatory to a iinishin g operati on performed in a lathe by means of rolls acting as burnishers and operated by the hand or by a slide.

It consists in a certain construction of the stamping puncheon, by which one portion thereof is made to hold the stamped metal in its place during the stamping operation and to disengage the same from the main body of the stamping-puncheon when the latter is withdrawn.

The accompanying drawings illustrate the invention.

Figure l represents the vertical projection of a new arrangement of a stamping-machine, which consists of a case, a, shown in section, having at its lower parta cylinder, b, in which a piston, b, may operate, which gives the impulse to the stampingpuncheon.

acted upon the plate c, that transmits the same to the rings d by means of tie-pieees e, provided with cushions gliding inside the upright posts of frame or case a. Said pressure may be acted by means of a screw with one or several threads, or by a piston moved by steam or any other motive power. rlhe pressure, however, being given, the pieces under pressure may be supported by any suitable stop.

The rings d, shown by vertical section and horizontal projection, Fig. 2, have eonic faces slightly grooved along the generating-line of the cone, in order to cause the metal placed between the two large rings d to be suitably stamped. lguncheonf, actuated by piston b', itself moved by steam, or rather by water and by means of an injecting-pump with valve,

&c., as for hydraulic presses, will effect the'` stamping.

To must Observe that the rod b", which connects the piston to the puncheon, is perforated through its whole length for the purpose of admitting another rod or stem, j, bearing at its upper part a small plate, j", which supports the stamped piece when puncheon fand .piston b are down.

These are the distinctive characters of the invention First, the use of either grooved or smooth rings intended to lessen the effort that might break the metal by 4stamping it, but, on the contrary, allows a considerable modeling withoutinjuring said metal 5 second, the applying of a rod crossing the stamping puncheon and connected to a plate resting upon said said puncheon, in order to secure the stamped piece to its place when the puncheon goes down again. The advantage of this arrangement for withdrawing from the puncl1- con the stamped piece will be easily linderstood, for every one knows that it is greatly adherent to it.

For certain pieces made of thick metal the arrangement represented by vertical section, Fig. 3, may be advantageously used. Here rings d are not grooved. Besides the puncheon is composed of two parts, g and g, that may be actuated simultaneously or separately, as required; and, of course, the center puncheon may be supplied at its upper part with a plate, f', that may be Workedlike that of puncheon f of Fio. 1. It is besides conceived that byl means of such arrangements it is easy to stamp I quently to disengage it, the Whole operating metal sheets and give them any suitable for preserving the thickness ofthemetal unidepth, according to the duetility of the nietal I form when acted upon by the puncheon beused. tween the grooved and beveled rings, as de- XVhat We claim as our invention, and desire scribed. to secure by Letters Patent, is T. GOMME, FILS.

stampingpnneheon f, for giving motion to \V;it1iesses:4 plate f on the upper part of said puncheon, ADOLPHE LE BLANC,

The use of the rod f2, sliding within the' BEAUGR-AND, ANic. so as to hold the Work in place, and subse- 2 GEO. HUTTON. 

